Achieving fluid motion takes more than counting ounces. The ultralight Optic 48 combines weight-saving design with exceptional fit and load management to give you a low base pack weight along with mileage-crushing efficiency. Comfortable carry and thoughtful trail features keep your head in the game so you stay ahead of your thru-hiking itinerary.AeroSpanAeroSpan is the ultralight evolution of the groundbreaking VaporSpan suspension, delivering the same combination of 360-degree moisture-wicking ventilation and tensioned perimeter frame load management while paying obsessive attention to weight reduction. Using body-mapping techniques to target friction and impact points allows Gregory to eliminate hotspots without excess padding. FocusForm shoulder harness and hipbelts and LifeSpan foam provides lightweight comfort that outlasts other weight-conscious cushioning materials.Measuring the back lengthMeasure with a tape measure along the spine from the 7th cervical vertebrae (the spinous process is easy to feel from the outside at the lower end of the neck furrow) to the iliac crest (at the level of the upper bony hip structure). Measure two or three times to get an accurate result. If you are between two frame sizes, the smaller size is right for you.Back lengthXS = 36 cm - 41 cmS = 41 cm - 46 cmM = 46 cm - 51 cmL = 51 cm - 56 cm Additional Information: - Backpack material: 100D high-strength nylon - Backpack bottom material: 210D high-strength nylon - Material lining: 135D high density polyester - Sunglasses holder - Rain cover stowable in lid compartment - Weight rain cover: 91 g - Maximum load: 14 kg Type: Multi-Day Rucksack Material Material description: 100 % nylon/ Lining: 100 % polyester Equipment Mounting options for equipment: Compression straps Dimensions...
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